Crystal structure of p-formylphenyl, di(p-methylphenyl)amine, and p-bromophenyl, di(o-bromo-p-methylphenyl)amine

p-Formylphenyl, di(p-methylphenyl)amine (1), and p-bromophenyl, di(o-bromo- p-methylphenyl)amine (2) were prepared and characterized by X-ray crystallo graphy. Formyl-substituted triphenylamine(1) crystallizes in the monoclinic space group P2(1)/c with a = 9.068(1), b=17.115(2), c=11.297(2)Angstrom, b eta = 106.73(1)degrees, V= 1679.0(5)Angstrom (3) and Z = 4. Bromo -substitu ted compound 2 crystallizes in the monoclinic space group P2(1)/n with a = 16.170(4), b = 7.9477(8), c = 16.906(4) Angstrom, = 117.67(2)degrees, V= 19 24.1(7) Angstrom (3) and Z = 4. The N atoms deviate slightly from the plane of the bonded C atoms and the benzene ring planes are rotated by 25-67 deg rees to avoid overlap of the ortho-substituted atoms. The major force of cr ystal formation comes from the multiple phenyl embraces (MPE).